Unwarrantedly in a list

A new website called How-Do has done a list of 100 media people in the North West. I'm not going to pretend I wasn't pleased to have been included in the 41-59 cluster. A link to it is here. There's even a comment from someone called Biz acumen (easy to be so rude when you're anonymous, isn't it?) - who refers to me as "the region's most unwarrantedly arrogant journo". Ace, must be doing something right. Is "unwarrantedly" even a word?